Visu Visualiz alizin ing Tim ime, Spac ace, an and Gen Genea - PowerPoint PPT Presentation

Visu Visualiz alizin ing Tim ime, Spac ace, an and Gen Genea ealogy Set ets with Ma Maps Robert Ball Department of Computer Science Weber State University

Key Features • Sets of data • A number of independent controls: • Map view (location and zoom) • Two sliders to control time: • Map slider • Person slider • Sliders can be synced either at low end or high end

Alice, Alice, Tom Bob Set B Set A Alice, Bob, Bob, Tom Alice Tom A symmetric A union B A intersection B difference B

Examples of sources of historically-correct maps • Historically-correct maps of Africa from 1879 to the present: http://www.brown.edu/Research/AAAH/map.htm • Ancient maps of Japan: http://www.fas.harvard.edu/~chgis/japan/archive/ • Historically-correct maps of China from 221 BC – 1911 AD: http://www.fas.harvard.edu/~chgis/data/chgis/downloads/v4/ • The National Historical Geographic Information System (NHGIS) - GIS- compatible boundary files for the United States between 1790 and 2010: www.nhgis.org/ • Ancient Greece and Rome: http://pleiades.stoa.org/

Example of Africa in 1900 (left) and 2002 (right)

Map View Can show historically-correct map with or without present-day overlay

Slider to move through historical maps

Person-slider • Color-coded to indicate year of event • Each colored circle is an event for a person

Demo